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Straight and kinked InAs nanowire growth observed in situ by transmission electron microscopy

Lenrick, Filip LU ; Ek, Martin LU ; Deppert, Knut LU ; Samuelson, Lars LU and Wallenberg, Reine LU (2014) In Nano Reseach 7(8). p.1188-1194
Abstract
Live observations of growing nanowires using in situ transmission electron microscopy (TEM) is becoming an increasingly important tool for understanding the dynamic processes occurring during nanowire growth. Here we present observations of growing InAs nanowires, which constitute the first reported in situ growth of a In-V compound in a transmission electron microscope. Real time observations of events taking place over longer growth lengths were possible due to the high growth rates of up to 1 nm/s that were achieved. Straight growth (mainly in aOE (c) 111 > B directions) was observed at uniform temperature and partial pressure while intentional fluctuations in these conditions caused the nanowires to form kinks and change growth... (More)
Live observations of growing nanowires using in situ transmission electron microscopy (TEM) is becoming an increasingly important tool for understanding the dynamic processes occurring during nanowire growth. Here we present observations of growing InAs nanowires, which constitute the first reported in situ growth of a In-V compound in a transmission electron microscope. Real time observations of events taking place over longer growth lengths were possible due to the high growth rates of up to 1 nm/s that were achieved. Straight growth (mainly in aOE (c) 111 > B directions) was observed at uniform temperature and partial pressure while intentional fluctuations in these conditions caused the nanowires to form kinks and change growth direction. The mechanisms behind the kinking are discussed in detail. In situ observations of nanowire kinking has previously only been reported for nonpolar diamond structure type materials (such as Si), but here we present results for a polar zinc blende structure (InAs). In this study a closed cell with electron and X-ray transparent a-SiN windows was used in a conventional high resolution transmission electron microscope, enabling high resolution imaging and compositional analysis in between the growth periods. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
environmental TEM, nanowires, in situ, InAs, group III-V, kinking
in
Nano Reseach
volume
7
issue
8
pages
1188 - 1194
publisher
Springer
external identifiers
  • wos:000341172400010
  • scopus:84942826252
ISSN
1998-0124
DOI
10.1007/s12274-014-0481-4
language
English
LU publication?
yes
id
b140ea21-388b-4236-9de0-428257fe1ace (old id 4725954)
date added to LUP
2014-10-30 12:59:07
date last changed
2017-10-22 03:15:15
@article{b140ea21-388b-4236-9de0-428257fe1ace,
  abstract     = {Live observations of growing nanowires using in situ transmission electron microscopy (TEM) is becoming an increasingly important tool for understanding the dynamic processes occurring during nanowire growth. Here we present observations of growing InAs nanowires, which constitute the first reported in situ growth of a In-V compound in a transmission electron microscope. Real time observations of events taking place over longer growth lengths were possible due to the high growth rates of up to 1 nm/s that were achieved. Straight growth (mainly in aOE (c) 111 > B directions) was observed at uniform temperature and partial pressure while intentional fluctuations in these conditions caused the nanowires to form kinks and change growth direction. The mechanisms behind the kinking are discussed in detail. In situ observations of nanowire kinking has previously only been reported for nonpolar diamond structure type materials (such as Si), but here we present results for a polar zinc blende structure (InAs). In this study a closed cell with electron and X-ray transparent a-SiN windows was used in a conventional high resolution transmission electron microscope, enabling high resolution imaging and compositional analysis in between the growth periods.},
  author       = {Lenrick, Filip and Ek, Martin and Deppert, Knut and Samuelson, Lars and Wallenberg, Reine},
  issn         = {1998-0124},
  keyword      = {environmental TEM,nanowires,in situ,InAs,group III-V,kinking},
  language     = {eng},
  number       = {8},
  pages        = {1188--1194},
  publisher    = {Springer},
  series       = {Nano Reseach},
  title        = {Straight and kinked InAs nanowire growth observed in situ by transmission electron microscopy},
  url          = {http://dx.doi.org/10.1007/s12274-014-0481-4},
  volume       = {7},
  year         = {2014},
}